"The measurements are not good."
Translation:Die Maße sind nicht gut.
Its to do with the position of nicht in the sentence. It should be "sind nicht gut". Depending on how you are using nicht and what you mean, it changes position in the sentence according to grammatical rules. This website explains it pretty generally (the rules can get a bit complicated) and is a good introduction. http://www.lsa.umich.edu/german/hmr/101/Mehr_Vorsprung_Grammatik/Kapitel_2.html